The super large bridge across the Yellow River on the Yangxin Expressway has unique characteristics,complex conditions,high seismic fortification intensity,large erosion,large swings in the main channel,and high requirements for bridge stability and dura-bility.The design of bridge type and bridge span should take into full consideration the comprehensive management of the Yellow Riv-er,development and utilization,flood control planning,navigation standards and other issues.At the same time,when choosing a reason-able span and determining the bridge type,not only must the bridge be located in the Yellow River IV channel requirements,but also comprehensively consider the terrain,hydrology,environmental protection and other factors along the line to connect it with other arteri-al highways,and realize the docking and connection of highways and domestic railways,forming a modern comprehensive transportation system.In view of the fact that the actual length of the Yellow River Bridge is 2 240 m,attention should be paid to the selection of bridge type schemes in the design to reduce the difficulty of bridge construction,reduce engineering costs,and facilitate bridge con-struction.This paper compares and analyzes the bridge design of the Yellow River super large bridge and the layout of the bridge across the levee,and selects a prestressed concrete continuous beam bridge with reasonable structural force,mature construction experience,low cost and low maintenance later as the optimal design scheme.
关键词
特大型桥梁/设计/跨大堤桥/路网衔接/方案比选
Key words
super large bridge/design/bridge across the embankment/road network connection/scheme comparison and selection
维普
万方数据